Nemesis or FNIS – Behavior Engines

Nemesis Ultimate Behavior Engine, why should I use it?
byu/Blink-Blink-Blink inskyrimmods

Via ChatGPT:

FNIS (Fores New Idles in Skyrim)

  • Strengths:
    • Wide mod support (especially older mods).
    • Great for creature animation mods.
    • Stable and time-tested.
  • Weaknesses:
    • No longer actively developed.
    • Limited features for modern mods.
  • Use FNIS If:
    • You rely on older mods requiring it (e.g., Fores Creature Pack, PC Exclusive Animation Path).

Nemesis (Nemesis Unlimited Behavior Engine)

  • Strengths:
    • Supports modern mods (e.g., MCO, SkySA, DAR).
    • Actively developed, open-source, no animation limit.
    • Can emulate FNIS behavior for many older mods.
  • Weaknesses:
    • Limited creature animation support.
    • Requires manual configuration.
  • Use Nemesis If:
    • You’re using modern combat/animation mods or creating a future-proof modlist.

Key Decision: Use One, Not Both

  • Don’t use FNIS and Nemesis together—they overwrite the same behavior files.
  • General Recommendation:
    • Use Nemesis unless your modlist heavily depends on FNIS-exclusive creature mods or older setups.